This document discusses code quality measurement and the goals of the Sonar tool. It begins by asking how code quality is measured and mentions measuring technical debt. It then lists the seven worst coding practices as duplicated code, complexity maldistribution, bad design, potential bugs, lack of unit tests, non-compliance with standards, and no/too many comments. The goals of Sonar are to help developers find problems and help managers monitor codebase health and trends. It concludes with a demonstration link to Sonar.

1. 1
Sonar in Action
by Frédéric DROUET and Arnaud HERITIER
02/03/2011

2. 2
Agenda
» How do we measure the code quality ?
» The 7 worst practices
» The Goals of Sonar
» Demonstration on YOUR code

3. 3
3
Why do we need this kind of tool

4. 4
How do we measure the code quality ?
In the past

5. 5
How do we measure the code quality ?
That is not sufficient !

6. 6
How do we measure the code quality ?
Today : we need to measure the Technical Debt …

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How do we measure the code quality ?
… and to monitor this Technical Debt …
… to take corrective actions without being blind

8. 8
The 7 worst practices

9. 9
The 7 worst practices
1- Duplicated code
» Which one do you prefer ?

10. 10
The 7 worst practices
2- Maldistribution of the complexity
» What is the best ?
» 1 method with a complexity of 30
» 10 methods with a complexity of 3

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The 7 worst practices
3- Bad design
» Which package / class
is responsible of what ?

12. 12
The 7 worst practices
4- Potential bugs

13. 13
The 7 worst practices
5- Little or no use of unit tests
» Please add a new case
BUT
without any regression of course

14. 14
The 7 worst practices
6- Non-compliance with standards
» We have opened a dedicated Wiki Space for Development Standards for eXo
» https://wiki-int.exoplatform.org/display/DEVSTD

15. 15
The 7 worst practices
7- No comment or too many comments

16. 16
The goals of Sonar

17. 17
The goals of Sonar
» Help the developer to find the problems
» Help the managers to monitor the health of the codebase
and to follow the trends

18. 18
Demonstration

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Demonstration
» https://sonar.exoplatform.org